Jin-won, also known as Constant in Lucid Adventure, is a member of Giga. He is a manager of of Giga's special Investigation Department, the Assistant-Leader of Giga's 13th squad and a member of Giga's secret service.
For some unknown reason he became a 'member' of Chairman Kim's Workshop and was treated like a slave and beaten regularly. In the the Early years of Lucid Adventure, Constant was a member of Zara Guild. Through the machinations of Sad Smile and Giga, Constant inadvertently caused Armes to be captured which eventually led to the collapse of Zara Guild.
He later joined Giga and has been with them since.
Main Article: Constant/Gallery